I'm running Fedora 8 on a Shuttle SN68PTG5 - and I've been very happy with it so far. The On-board sound is specified as: 7.1 channel High Definition Audio, Realtek ALC888DD codec by the manufacturer. Soundcard detection shows: Vendor: nVidia Corporation Model: MCP67 High Definition Audio Module: snd-hda-intel The Soundcard detection only shows options for PCM device related to ALC883. (Analog and Digital.) Sound output has been working fine with ALC883 Analog. Here is the relevant section from lspci -v 00:07.0 Audio device: nVidia Corporation MCP67 High Definition Audio (rev a1) Subsystem: Holco Enterprise Co, Ltd/Shuttle Computer Unknown device 3114 Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19 Memory at fe020000 (32-bit, non-prefetchable) [size=16K] Capabilities: [44] Power Management version 2 Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ Queue=0/0 Enable- Capabilities: [6c] HyperTransport: MSI Mapping Enable- Fixed+ Kernel driver in use: HDA Intel Kernel modules: snd-hda-intel My problem is when I try to use the sound input - either front mic or line-in sockets. If I start Audacity I see -30dB noise on the left channel only, even with no input source connected. If I feed in a signal from a CD player or the mic I see it on the left channel, in addition to the noise, and still get nothing at all on the right channel. (Found this problem with the version of audacity on the Fedora repos, and I have also updated to the latest Beta of Audacity with no change.) The noise is real and not just in Audacity as I can hear it if I route the input to the headphone output. Thinking this was a connection or board problem I visited the supplier's offices. They installed a copy of Vista on it temporarily and it worked perfectly. This led me to believe that the problem must be with the drivers. I was up-to-date with the alsa drivers, lib and utilities from the fedora repos at 1.0.15. On the Realtek site I found a linux driver set dated February 20th and tried that. I have now downloaded 1.0.16 driver, llib and utils from the alsa site, compiled and installed. (I did also try hg20080501 from the nightly builds, but got a compilation error.) I have tried setting the model= option on the driver to the following values 3stack-dig, 6stack-dig, 3stack-6ch, 3stack-6ch-dig without success. (I belive the last of these would be the correct one.) Any suggestions on how to progress further please. (Yes I know I could get a separate sound card, but I'd like to get this one working if I can, especially as it works well for output.) I used to be a competent C programmer some 15 years ago (until management and Java programming intervened) so if there are some low-level utilities I can use or tweak... Thanks, Mike Evans ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ Alsa-user mailing list Alsa-user@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-user
